Crystal oscillator frequency calibration method and calibration device for communication terminal
A technology of communication terminal and crystal oscillator frequency, which is applied in the field of communication, can solve problems such as difficulty in adapting to crystal oscillator frequency calibration and inaccuracy, and achieve the effect of increasing flexibility and efficiency and improving frequency calibration accuracy
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[0029] As mentioned in the background technology, in the prior art, the frequency calibration of the frequency synthesizer of the communication terminal is only divided into two frequency adjustment steps of high frequency and low frequency. Calibration of the crystal frequency of the communication terminal.
[0030] Those skilled in the art know that the low frequency calibration accuracy of communication terminals will lead to slow network search time and slow frequency convergence during synchronization, especially for network search and synchronization at high and low temperatures. If the frequency calibration method of the prior art is used, calibration The accuracy will be worse, but if the frequency calibration is performed for each communication mode and each frequency band, the calibration efficiency will be too low.
[0031] Therefore, the embodiment of the present invention provides a method for calibrating the crystal oscillator frequency of a communication termina...
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